docs: add Note to outside contributors for forma websites

[bgutsol]

Purpose of PR

Replicate #2323 since that one is failing on CI

[changeset-bot]

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Latest commit: 6dc2057

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[github-actions]

size-limit report 📦

Path	Size	Loading time (3g)	Running time (snapdragon)	Total time
CommonJS	122.77 KB (0%)	2.5 s (0%)	79 ms (-11.88% 🔽)	2.6 s
Module	119.38 KB (0%)	2.4 s (0%)	60 ms (-19.96% 🔽)	2.5 s

[denkristoffer]

I think the better solution here is to provide a JSON export that users can load into their own space with the right content model, and then add some docs around getting that up and running instead.

[bgutsol]

I think the better solution here is to provide a JSON export that users can load into their own space with the right content model, and then add some docs around getting that up and running instead.

Good idea @denkristoffer, would you mind adding it to our Forma36 backlog?